Flattening of the Yield Curve Daniel Guidotti 14 years ago Flattening of the Yield CurveFluctuation in yield curve wherein the spread/ difference between the long term yield and short-term yield on a Treasury has reduced. Can be compared with butterfly shift and yield curve steepening.Recommended for you:Steepening of the Yield Curve Non-Parallel Shift in the Yield Curve Yield Curve Yield Curve Strategies